Fuels and Combustion Oxygen percentage (by weight) in atmospheric air is 29 21 19 23 29 21 19 23 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The weathering index of a coal Is a measure of its caking tendency Gives an idea of the fusion temperature of ash Is a measure of its size stability, when stored & exposed to weather Is related to its calorific value Is a measure of its caking tendency Gives an idea of the fusion temperature of ash Is a measure of its size stability, when stored & exposed to weather Is related to its calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A coal with high ash content Is harder and stronger Has low quantity of mineral matter Is not subjected to washing Has higher calorific value Is harder and stronger Has low quantity of mineral matter Is not subjected to washing Has higher calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During combustion of coal on grate, clinker formation is increased by the Low fusion point of ash (< 1100° C) All of these Use of thick fire bed Use of preheated primary air Low fusion point of ash (< 1100° C) All of these Use of thick fire bed Use of preheated primary air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Caking coal is desirable for Coke making Burning on firebars Burning on travelling grate All of these Coke making Burning on firebars Burning on travelling grate All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal during its high temperature carbonisation None of these Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls Increases the loss of fine coal dust from the ovens when charging Reduces the coking time None of these Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls Increases the loss of fine coal dust from the ovens when charging Reduces the coking time ANSWER DOWNLOAD EXAMIANS APP
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